package com.book.book.interceptor;

import com.book.book.constant.Constants;
import com.book.book.model.Result;
import com.book.book.model.UserInfo;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


@Slf4j
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("目标方法执行前............");
        HttpSession session=request.getSession(false);
     if(!checkUser(session)){
         response.setContentType("text/html;charset=utf-8");
         response.setStatus(401);
         String msg="用户未登录";
         response.getOutputStream().write(msg.getBytes("UTF-8"));
         return false;
     }
        //true 放行   false 拦截
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("目标方法执行后.............");


        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    private boolean checkUser(HttpSession session){
        if(session==null||session.getAttribute(Constants.SESSION_USER_KEY)==null){
            log.warn("用户未登录");
            return false;
        }
        UserInfo userInfo= (UserInfo) session.getAttribute(Constants.SESSION_USER_KEY);
        if(userInfo==null||userInfo.getId()<=0){
            //用户未登录
            log.warn("用户未登录");
            return false;
        }
        log.info("登陆成功");
        return true;
    }


//    @Override
//    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//        log.info("视图渲染完成后。。。。。。。。");
//
//        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
//    }
}
